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    Item #
    Length
    Source of Standard
    Year Implemented
    Version Implemented
    Year Retired
    Version Retired
  
  
    420
    4
    SEER/CoC
    
    
    
    
  



NAACCR XML: Tumor.histologyIcdO2


Alternate Names

   Histology (CoC)

   ICD-O-2 Histology (CCCR)


Description
Codes for the histologic type of the tumor being reported using ICD-O-2. NAACCR adopted ICD-O-2 as the standard coding system for tumors diagnosed in 1992 and later and recommended that prior cases be converted to ICD-O-2.

Note: See Histology (73-91) ICD-O-1 [1971] for ICD-O-1 and field trial codes. 
    Codes See ICD-O-2,¹⁵ Morphology Section.
   
Clarification of Required Status  
This data item is required by all standard-setting organizations for  tumors diagnosed from January 1, 1992, through December 31, 2000, and  recommended for tumors diagnosed before 1992.  

When the histologic type is coded according to ICD-O-2, the histology  code must be reported in Histology (92-00) ICD-O-2 [420], with behavior  coded in Behavior (92-00) ICD-O-2 [430].  

For information on required status for related data items for histologic  type and behavior when coded according to ICD-O-3, see Histologic Type  ICD-O-3 [522] and Behavior Code ICD-O-3 [523].